如图世界自然基金会应对全球气候变化所提出的“地球一小时”活动的宣传图画，小明决定响应此项号召按时熄灯一小时，小明家的照明电器功率和880W的电饭锅相当，计算可知此项活动可使小明家节约____ kW•h的电能，此电饭锅正常工作时电阻为____ Ω．

完型填空

    阅读下面短文，掌握其大意，然后从A,B,C,D四个选项中选出可以填人空白处的最佳选项。

    The first note I ever wrote for my mother said "Hi, Mom! Have a nice day！Love, Marie!". I was twelve when I wrote it, and I folded the1into her change purse（零钱包）.

    My mother worked as a cleaner in a clothing factory. I knew that when she2meals in the dining hall, she would have to look for change in her purse. I didn't know that she would3that note，and always carry it with her.

    From the day that I4folded the small piece of paper into my mother's change purse, she and I left each other5notes. They would be put in the fridge, under a lamp, or beside the TV set. I6found one hidden in my shoe. From the outside, our notes may have been general7 of our days，ideas and wishes. But to my mother and8，they were a lifeline-a communication with each other that no one else9.

    On October 20, 2009，my mother died after a long illness. I stood near her bed，10her hand. I didn't cry the day my mom died11I didn't cry a week later when I went to collect her things. I was so thankful that she no longer had aches and12.

    Recently, I found a note that my mom. had13 me. It had been hidden in the14of my favorite childhood book for years. It read“Dear Marie，I love you always. Miss you a lot. Don't forget me. Be15 ！Love，Mom”That day，I cried.